56 lines
1.5 KiB
YAML
56 lines
1.5 KiB
YAML
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title: Windows Processes Suspicious Parent Directory
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author: vburov
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date: 2019/02/23
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description: Detect suspicious parent processes of well-known Windows processes
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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Image:
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- '*\svchost.exe'
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- '*\taskhost.exe'
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- '*\lsm.exe'
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- '*\lsass.exe'
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- '*\services.exe'
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- '*\lsaiso.exe'
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- '*\csrss.exe'
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- '*\wininit.exe'
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- '*\winlogon.exe'
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SELECTION_3:
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ParentImage: '*\SavService.exe'
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SELECTION_4:
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ParentImage:
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- '*\System32\\*'
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- '*\SysWOW64\\*'
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SELECTION_5:
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ParentImage:
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- '*\Windows Defender\\*'
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- '*\Microsoft Security Client\\*'
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SELECTION_6:
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ParentImage: '*\MsMpEng.exe'
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SELECTION_7:
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ParentImage|re: ^$
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condition: (SELECTION_1 and ((SELECTION_2 and not (SELECTION_3 or SELECTION_4))
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and not (SELECTION_5 and SELECTION_6)) and not (SELECTION_7))
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falsepositives:
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- Some security products seem to spawn these
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id: 96036718-71cc-4027-a538-d1587e0006a7
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level: low
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logsource:
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category: process_creation
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product: windows
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modified: 2020/11/28
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references:
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- https://securitybytes.io/blue-team-fundamentals-part-two-windows-processes-759fe15965e2
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- https://www.carbonblack.com/2014/06/10/screenshot-demo-hunt-evil-faster-than-ever-with-carbon-black/
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- https://www.13cubed.com/downloads/windows_process_genealogy_v2.pdf
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- https://attack.mitre.org/techniques/T1036/
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1036
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- attack.t1036.003
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- attack.t1036.005
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ruletype: SIGMA
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